Question: When did Roman Abramovich marry Irina Abramovich?
Paraphrase: At what time did Roman Abramovich marry Irina Abramovich?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q171428 p:P26 ?s . ?s ps:P26 wd:Q46109451 . ?s pq:P580 ?value}